There are many reasons for hypertensive patients to be hospitalized, the most important ones are as follows: First, when patients are first diagnosed with hypertension, they have to identify the cause of hypertension and do relevant examinations to clarify whether it is secondary or primary hypertension; Second, when patients take oral antihypertensive drugs, their blood pressure is still not well controlled and significantly elevated, they have to be hospitalized for relevant examinations and adjust antihypertensive drugs at the same time; Third, hypertensive patients have cardiovascular and cerebrovascular complications that require hospitalization, such as acute left heart failure, acute myocardial infarction, cerebral hemorrhage and cerebral infarction in hypertension, which require emergency hospitalization, and aortic coarctation in hypertensive patients, which require emergency hospitalization.